[AG-TECH] Possible enhancement for Toolkit

Andrew Rowley Andrew.Rowley at man.ac.uk
Fri Sep 10 04:37:01 CDT 2004


I have noticed problems with multiple adaptors in XP also - this has also
appeared on the mailing list some time ago.

With multiple network adaptors, Windows XP may or may not choose the correct
adaptor for sending and receiving multicast packets - if you are lucky it
does!  If like me you are not lucky, you must disable all but the adaptor
that you want to use, otherwise you may not be able to use multicast
correctly.  Microsoft have said that this is a bug in Windows XP and it is
fixed with service pack 2 which I for one am not installing yet due to other
problems with it.  It is also related to the fact that programs do not allow
you to select the adaptor to bind to and therefore bind to the default
adaptor which may or may not be the correct adaptor, depending on how lucky
you are.  

So it is a valid point that you should be able to select the adaptor which
AGTk binds to rather than leaving it up to luck, or being forced to disable
all the other adaptors.  The main problem I can see with this is that you
need to tell VIC and RAT to use this adaptor too - does anyone know how this
can be done?

(Note see http://support.microsoft.com/?kbid=827536 for details of the
multicast problems in Windows XP)

Andrew :)

Access Grid Support Centre,
SVE Group,
Manchester Computing,
Kilburn Building,
University of Manchester,
Oxford Road,
M13 9PL, 
Tel: +44(0)161-275 0615
Email: Andrew.Rowley at man.ac.uk 

-----Original Message-----
From: owner-ag-tech at mcs.anl.gov [mailto:owner-ag-tech at mcs.anl.gov] On Behalf
Of Ivan R. Judson
Sent: 10 September 2004 03:01
To: 'Randy Groves'; ag-tech at mcs.anl.gov
Subject: RE: [AG-TECH] Possible enhancement for Toolkit

The toolkit is already handling the case where the machine has multiple
network adapters; indeed almost all laptops have both wireless and wired
connections, mine which I use for development has the following:

NetWork Card(s):           3 NIC(s) Installed.
                           [01]: Intel(R) PRO/100 VE Network Connection
                                 Connection Name: Fast Ethernet
                                 Status:          Media disconnected
                           [02]: Intel(R) PRO/Wireless 2100 LAN 3B Mini PCI
                                 Connection Name: Wireless Network
                                 DHCP Enabled:    Yes
                                 DHCP Server:
                                 IP address(es)
                           [03]: Cisco Systems VPN Adapter
                                 Connection Name: MCS VPN
                                 DHCP Enabled:    No
                                 IP address(es)

Plus, add the vmware interfaces, MS's fancy ipv4/ipv6 tunnels, teredo, et al
and you'll find that on XP the toolkit is doing quite a good job of working
in the face of *many* network interfaces ;)

Here's my development desktop net interfaces:

NetWork Card(s):           4 NIC(s) Installed.
                           [01]: 3Com 3C920 Integrated Fast Ethernet
(3C905C-TX Compatible)
                                 Connection Name: Wired
                                 DHCP Enabled:    Yes
                                 DHCP Server:
                                 IP address(es)
                           [02]: VMware Virtual Ethernet Adapter for VMnet1
                                 Connection Name: VMware Network Adapter
                           [03]: VMware Virtual Ethernet Adapter for VMnet8
                                 Connection Name: VMware Network Adapter
                           [04]: 1394 Net Adapter
                                 Connection Name: 1394 Connection 2
                                 DHCP Enabled:    Yes
                                 DHCP Server:     N/A
                                 IP address(es)

What kind of a feature are you looking for? What's the use case you're
experiencing? What problem are you trying to solve? 


> -----Original Message-----
> From: owner-ag-tech at mcs.anl.gov 
> [mailto:owner-ag-tech at mcs.anl.gov] On Behalf Of Randy Groves
> Sent: Thursday, September 09, 2004 8:38 PM
> To: ag-tech at mcs.anl.gov
> Subject: [AG-TECH] Possible enhancement for Toolkit
> My recent experience with the 'Microsoft TV/Video' network 
> connection brings to mind an enhancement.  It would be nice 
> if, during the install (and maybe accessible later via a 
> python script), if the Toolkit finds more than one network 
> adaptor installed on the machine, it would ask the installer 
> which one it should use.  This would have made it obvious in 
> my case, but also would handle the case where there REALLY is 
> more than one network adaptor in a machine.  I know that I've 
> also seen a 1394 network adaptor installed on various 
> machines with FireWire adaptors.
> I will enter this in Bugzilla if it sounds like a good idea.
> -randy

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